AVAudioSession不识别来自蓝牙设备的音频

我正在使用AVAudioSession来侦听语音输入。它适用于有线耳机，但它不适用于连接的蓝牙设备。以下是我使用的设置输入蓝牙话筒代码AVAudioSession不识别来自蓝牙设备的音频

func setupSessionForRecording() { 
    let audioSession = AVAudioSession.sharedInstance() 
    do { 
     try audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord, with: [.allowBluetooth]) 
    } catch let error as NSError { 
     debugPrint("Error in listening "+error.localizedDescription) 
    } 
    var inputsPriority: [(type: String, input: AVAudioSessionPortDescription?)] = [ 
     (AVAudioSessionPortLineIn, nil), 
     (AVAudioSessionPortHeadsetMic, nil), 
     (AVAudioSessionPortBluetoothHFP, nil), 
     (AVAudioSessionPortUSBAudio, nil), 
     (AVAudioSessionPortCarAudio, nil), 
     (AVAudioSessionPortBuiltInMic, nil), 
     ] 
    for availableInput in audioSession.availableInputs! { 
     guard let index = inputsPriority.index(where: { $0.type == availableInput.portType }) else { continue } 
     inputsPriority[index].input = availableInput 
    } 
    guard let input = inputsPriority.filter({ $0.input != nil }).first?.input else { 
     fatalError("No Available Ports For Recording") 
    } 
    do { 
     try audioSession.setPreferredInput(input) 
     try audioSession.setMode(AVAudioSessionModeMeasurement) 
     try audioSession.setActive(true, with: .notifyOthersOnDeactivation) 
     try audioSession.setPreferredIOBufferDuration(10) 
    } catch { 
     fatalError("Error Setting Up Audio Session") 
    } 
}

此代码将停止服用从设备麦克风输入和我也得到声音在蓝牙耳机，它已准备好倾听，但它不”从设备中选择任何输入。

此外，

当我尝试播放任何音频到蓝牙耳机它不工作。下面是代码播放音频

 do { 
      let output = AVAudioSession.sharedInstance().currentRoute.outputs[0].portType 
      if output == "Receiver" || output == "Speaker"{ 
       try AVAudioSession.sharedInstance().overrideOutputAudioPort(.speaker) 
      } 
      else{ 
       try AVAudioSession.sharedInstance().overrideOutputAudioPort(.none) 
      } 
      print("Voice Out \(output)") 
     } catch let error as NSError { 
      print("audioSession error: \(error.localizedDescription)") 
      os_log("Error during changing the current audio route: %@" , log: PollyVoiceViewController.log, type: .error, error) 
     } catch { 
      os_log("Unknown error during changing the current audio route", log: PollyVoiceViewController.log, type: .error) 
     } 
     do { 
      let soundData = try Data(contentsOf: url as URL) 
      self.audioPlayer = try AVAudioPlayer(data: soundData) 
      self.audioPlayer?.prepareToPlay() 
      self.audioPlayer?.volume = 3.0 
      self.audioPlayer?.delegate = self 
      self.audioPlayer?.play() 
     } catch let error as NSError { 
      print("Error getting the audio file"+error.description) 
     }

来源

2017-10-09 Nilesh Tupe

嗨，你解决了吗？ –